From now on when your company reaches a total assets value of below zero the court will impose bankruptcy upon your company and you will lose all assets. Forcing you to restart the game.

This is an exceptional situation which can only occur when you are hogging too much trash or nuclear waste, so don't worry about it, under normal circumstance the system will warn you when you try to buy too much trash.

Or of course, if you didn't invest well and costs kept piling up, you'll eventually go broke too.

But don't worry, just keep at it and eventually you are bound to reach success.

"Only those who dare to fail greatly can ever achieve greatly." - Kennedy